在Java中检查布尔值

Question

I want to return a boolean value to check if the String contains any 'value' or not after getting data from database. It should return true if it contains anything else false.

JSONObject context = memory.getContext(senderId, sessionId);

If this context contains any value from db, it should return true when i sysout it. Thanks in advance for your help.

I am using org.json.simple library

Answer 1

Just check if the context is null or not and return if size() is grater than 0 .

...
JSONObject context = memory.getContext(senderId, sessionId);

return context != null && context.size() > 0;

Answer 2

由于JSONObject是org.json.simple.JSONObject它的size方法将使您确定它是否具有任何内容，例如：

return context != null && context.size() > 0;